Change InternalReadLine to always use buffer.read() return value

[apt.git] / apt-pkg / contrib / fileutl.cc

diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc
index c4ff36a13f7b7ccf40f59faed76ef8d16e2b977c..aa5831f583501e3711cf64b2962e57692549fc60 100644 (file)
--- a/apt-pkg/contrib/fileutl.cc
+++ b/apt-pkg/contrib/fileutl.cc
@@ -932,7 +932,7 @@ protected:
         bool empty() { return bufferend <= bufferstart; }
         unsigned long long size() { return bufferend-bufferstart; }
         void reset() { bufferend = bufferstart = 0; }
-        ssize_t read(void *to, unsigned long long requested_size)
+        ssize_t read(void *to, unsigned long long requested_size) APT_MUSTCHECK
         {
            if (size() < requested_size)
               requested_size = size();
@@ -995,19 +995,15 @@ public:
 
         unsigned long long const OutputSize = std::min(Size, buffer.size());
         char const * const newline = static_cast<char const * const>(memchr(buffer.get(), '\n', OutputSize));
+        // Read until end of line or up to Size bytes from the buffer.
+        unsigned long long actualread = buffer.read(To,
+                                                    (newline != nullptr)
+                                                    ? (newline - buffer.get()) + 1
+                                                    : OutputSize);
+        To += actualread;
+        Size -= actualread;
         if (newline != nullptr)
-        {
-           size_t length = (newline - buffer.get()) + 1;
-           buffer.read(To, length);
-           To += length;
            break;
-        }
-        else
-        {
-           buffer.read(To, OutputSize);
-           To += OutputSize;
-           Size -= OutputSize;
-        }
       } while (Size > 0);
       *To = '\0';
       return InitialTo;